<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model.trim="username" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.trim="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model.trim="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click="remove(index)">删除</button>
            <button @click="echo(item, index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      arr: [
        { name: "Tom", age: 19, gender: "男" },
        { name: "Jone", age: 21, gender: "女" },
      ],
      username: "",
      age: "",
      gender: "",
      falg: false,
      currentIndex: "",
    };
  },
  methods: {
    add() {
      if (!this.username || !this.age || !this.gender)
        return alert("请正确输入");
      if (this.falg) {
        this.arr[this.currentIndex].name = this.username;
        this.arr[this.currentIndex].age = this.age;
        this.arr[this.currentIndex].gender = this.gender;
        this.falg = false;
      } else {
        this.arr.push({
          name: this.username,
          age: this.age,
          gender: this.gender,
        });
      }
      this.username = "";
      this.age = "";
      this.gender = "";
    },
    echo(data, i) {
      this.falg = true;
      this.username = data.name;
      this.age = data.age;
      this.gender = data.gender;
      this.currentIndex = i;
    },
    remove(i) {
      this.arr.splice(i, 1);
    },
  },
};
</script>
